fix broken sysconf when correct value is -1

this caused glib to try to allocate >2gb for getpwnam_r, and probably
numerous other problems.

diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 5b6c14e..07072cc 100644 (file)
--- a/src/conf/sysconf.c
+++ b/src/conf/sysconf.c
@@ -220,7 +220,7 @@ long sysconf(int name)
        } else if (values[name] == OFLOW) {
                if (name == _SC_ARG_MAX) return ARG_MAX;
                if (name == _SC_SEM_VALUE_MAX) return SEM_VALUE_MAX;
-       } else if (values[name] < 0) {
+       } else if (values[name] < OFLOW) {
                long lim[2];
                __syscall(SYS_getrlimit, values[name]&16383, lim);
                return lim[0] < 0 ? LONG_MAX : lim[0];